what this means for hugo chavez and his government. also here in the u.s., the gun control debate. a house democrat, a vietnam veteran and gun owner, talk ts about possible regulation. then at 3:00 eastern, a plane goes down off venezuela, a fashion executive is missing. the latest on the search for vittorio missoni.>>> good-bye, l cliff, hello debt ceiling cliff. i'm ali velshi. your elected officials ready to push america over the edge of the cliff. >>ly not have another debate with this congress over whether or not they should pay the bills that they've already racked up through the laws that they passed. >> well, yes, you will, mr. president, and very soon. democrats and republicans are set to clash again over raising the u.s. debt ceiling. let me tell you back in the old days the u.s. had a system where every time a bill involving money was passed the treasury had to raise money for it by issuing bonds. the debt ceiling law was established to give the u.s. treasury the flexibility to borrow money without going to congress to get approval every time a bill was passed. it had ab